【题目】__________ you may go or stay, at least wait until you get the letter.

【题目】Of all subjects, chemistry seems to be __________ for me to master.

【题目】I can hardly make a __________ on how to deal with this problem.

【题目】Don't make____________same mistake for the second time in____________day.

【题目】He explained again and again in order to make what he did ________.

【题目】As far as we know, safety comes first 　　　　you do.

【题目】Both Lily and Lucy ______________to the party yesterday, but they didn't come at all.

【题目】—Have you finished the book ______________you borrowed from the library?

【题目】Many volunteers ______________food and water to the local people.

【题目】________the things like knives and medicine away in our house so that we can keep childr safe.